I have a viewsonic optiquest monitor Q20WB and buttons not workin

Try unlocking it:
http://www.fixya.com/support/r4628438-aoc_monitor_lock_unlock_instructions

1) Press the MENU-button ( ) to activate the OSD window.

2) Press or to navigate through the functions. Once the desired function is highlighted, press the MENU-button to
activate sub-menu . Once the desired function is highlighted, press MENU-button to activate it.

3) Press or to change the settings of the selected function. Press or to select another function in sub-menu .
Press AUTO( ) to exit . If you want to adjust any other function, repeat steps 2-3.

4) OSD Lock Function: To lock the OSD, press and hold the MENU button while the monitor is off and then press power
button to turn the monitor on. To un-lock the OSD - press and hold the MENU button while the monitor is off and then
press power button to turn the monitor on.

5) Eco Mode hot key ( ) : Press the Eco key continuously to select the Eco mode of brightness when there is no OSD (
Eco mode hot key may not be available in all models).

6) Volume adjustment hot key : When there is no OSD , press Volume ( ) to active volume adjustment bar, press or
to adjust volume ( Only for the models with speakers).

Do you see any caps with domed tops?
See example of 19" version with bad caps here: http://s807.photobucket.com/albums/yy352/budm/Optiquest%20Q19WB/

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.
Please leave rating if it helps.

Hello,

We have a repair guide for the Q19WB model posted on our web site at: http://www.ccl-la.com/blog/index.php/how-to-repair-a-optiquest-q19wb-monitor/
This model is basically the same instructions to open it as on your model. If you need the parts for your repair we also carry them in a kit at: http://www.ccl-la.com/catalog/product_info.php?products_id=115
If you have any questions just let us know.

I hope this helps, if so please rate our solution.

CCL Tech
Corporate Computer
www.ccl-la.com

Look at the board where the AC power connector comes in that is the power supply board, there are more than one versions so it nay not have the same caps value.
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed Viewsonic/Optiquest monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague

http://www.badcaps.net

Post pictures or send them to me [email protected]

Hi Rickyknows2,
If you are not hearing any beep I assume you are having problem with your video so, please ...
- open your PC and check whether your video card is well placed (sometimes it looks fine but you never know) remove it and put it back.
- If you used to remove often the cable from the PC, it might be that the pins from the monitor cable are even broke... please check.
- try to find another video card and replace it just to make sure its the video ...
- last... reset the bios (but I doubt that this is your problem)
chsers ..

It's an issue with the power supply, most likely the Capacitors (one or more) may be shot. Open it up if it is out of warrenty, look at the capacitors (they look like cans), if they are bulging at the top or even sides they are bad. This is a common problem with this monitor. Crappy Caps used in manufacturing. Replace all the caps with same rated caps and you should be good. Do your research on how to desolder the old ones off and proper installation of the new ones.

Sounds like the LCD panel inverter is going out, if not gone out completely.

I'd like to report a success story. I had this same problem with my Q20WB. It sat for over a year in my garage. I eventually bought replacement capacitors, soldered them in, and now it works. You can find kits with the right capacitors preselected, or if you feel like it you can also buy them individually.

good luck

I had the exact same problem. The screen went black and the green light flashed. I went ahead and took the monitor apart (scary) and took a look at the power supply circuitry. I saw 6 suspicious electrolytic caps on the board. Three 470uF 25V 105 degree C caps, two 1000uF 10V 105 degree C caps, and one 470uF 10V 105 degree cap. They all appeared to be slightly bulging and one even had a small hole in the top. I decided to replace all of them. The parts cost a little more than 5 bucks. I couldn't find a 470uF 10V cap at my local store so I bought a 16 V version instead, which is fine. Anyway, after replacing all 6 caps, the monitor works as good as new.

Have you tried another power cable? It could be a power supply problem. Too be honest, being a 15" crt monitor it would prob be cheaper to replace the whole unit than have it diagnosed and repaired